108line to a small nichrome wire loop diameter5 Because of the ver The resulting velocity vs distance lines were lonto the theoretical curves emated the terminal velocities by extrapolatioDrag me ID: 474847
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1992The Journal of Arachnology20BALLOONINGRobert BDepartment of Biology, Vassar College, Poughkeepsie, New YorABSTRACTBallooning, the aerial displacement of a spider caused by friction between air and the spide 108line to a small nichrome wire loop (diameter5. Because of the ver. The resulting velocity vs. distance lines were lonto the theoretical curves (emated the terminal velocities by extrapolatioDrag measurementData derived from thacrylate glue) to the end of a wire 1. DC outpu SUTERBALLOONINGabFigure 2. Both the FM-encoded signal bearing drag informatio 110100maximum silk32261256"0725so0910Figures 3-12; the othe. Each graph on the right shows the relationshi SUTERBALLOONINGI calibrated the apparatus at the end of eac,. Those theoretical curves repthe wind tunnel experimentslengths of silknZLTimeFigure 13e; (b) all legs loosely held against the bodywas by no means perfect. 8, 9) but not for the othesion that posture must play a prominent role iyvelocity vsR= 0U1R= 0P� 01�.49,P.05 112\t000030500Time(sFigure 14. The postures shown at three points in thcharacteristics of the surfaces of the spider itselcan vary by a factor of 2: at 5 cm.07 m/s). 3, 50 cm/s), the effect of this postural chang SUTERBALLOONINGofposture as an influence oocourse, vary with the amountofsilk that is usedofsilkofposture will be greater than wheisvery long and littleofthe drag on the silkand appendagesisknown about the amountofsilk actually usedofdata meanofposture in the travelsoballooning spiders (even in their ability to con-ofthe manuscript, and to FernandofVassar CollegeSphodrosandUmmidiabal. J., 13. J. Arachnol. H. J. J(Pardosa,Ara-. Van WingerdenManuscript received December 1991, revised Februar